Fire safety device for motion-picture machines



M I 29 1927. arch e. LOSCHIRICO EIRE} SAFETY DEVICE FOR MOTION PICTURE MACHINES I Filed Sept. 4, 1926 Patented Mar. 29, 1927.

UNITED, STATES GESUALDO LOSCHIRICO, OF NEW YORK, N. Y.

FIRE SAFETY DEVICE FOR MOTION-PICTURE MACHINES.

Application filed September 4, 1926.

This invention relates to cooling apparatus for a motion picture projector, and has for its object to provide a device of this character which will etliciently disperse the heat emanations which accompany the light rays directed toward a picture film during the operation of the said projector.

The films which are commonly used in motion picture work are of a highly inflammable nature and are frequently ignited when in course of operation, thereby causing delays in the showing of the picture and considerable danger from possible general tires.

This device rapidly removes all heat from the vicinity of the film and does not in any way interfere with its operation. in fact, it removes any dust particles which may have gathered on the film and tends to keep same clean and in good order.

Other objects and features of the invention will be pointed out and fully described in the following specification. and illustrated in the accompanying drawings, in which:

Fig. 1 shows a side elevation of a motion picture projector with the device mounted adjacent thereto.

Fig. 2 shows a plan view within the limits of the line 22 of Figure 1.

Fig. 3 shows an enlarged front view of the nozzle elements with forward section of the compression tank on the line 3-3 of Figure Fig. 4 shows a section on the line 44 of Figure 3.

Fig. 5 shows a section on the line 55 of Figure 4.

Fig. 6 shows a still further enlarged fragmentary view of the nozzle base and housing.

Fig. 7 shows a rear end view of the air compressor and the compression tank as illustrated in Figure 2.

Referring to Figure 1 of the drawings, the apparatus is shown mounted adjacent to a projector having a lamp chamber 10, a light tube 11, reel elements 12 and 13, and with a picture film 14 connected to the said reel elements.

Referring now to Figure 2, the invention comprises an oscillatory nozzle 15 and certain mechanical elements for the operation thereof, all mounted in connection with an air compressor 16 and a compression tank 17, the compressor being operated by a motor Serial No. 133,527.

as shown at 18 in Figure 1, or by any suitable source of power.

Still referring to Figure 2 the cylinder of the compressor 16 and the compression tank 17 are mounted side by side on suitable bases as shown at 19 and 20, and are connected by an air pipe 21. A pressure gauge 22 mounted on the compression cylinder and a safety valve is shown at 23. A drive wheel 24 of the compressor is shown with parts broken away in Figure 1.

The basic parts of the invention are as follows. The nozzle elements may best be described in connection with Figures 3, 4, 5 and 6. in which a retangular tube 25 has a base element of circular form 26. A passsage 27 extends through its entire length and opens into a chamber 28 which is open at the bottom as shown at 29. This base element is rotatably titted within the housing 30 which has a space 31 provided at the top to permit of the oscillating movement of the nozzle. A front plate 32 is secured to the housing, and a stud 38 which is secured to the base element of the nozzle, projects,

through the face of the said plate.

The housing 30 is secured to the forward top portion of the compression tank 17 and air may freely pass therethrough and upward through the nozzle elements.

A crank 36 is secured to the stud 33, it has a slot 37 and when engaged by the actuating members, which will be hereinafter described, is caused to move up and down to oscillate the nozzle.

A sleeve 40 is telescoped over the nozzle 25 and has its base end 41 shaped high in the center and low at its outer edges. A cam finger 42 is secured to the face plate 32 and engages the lower portion of the said sleeve, causing it to be raised and lowered as it moves from side to side, the sleeve being retracted by the springs 43 and 44. Thus, while the sleeve is low when the nozzle is in its central position, it is high when at the side extremities of its movement.

A shut off valve is shown in Figures 4 and 5 at 34, which provides means to regulate, or to stop the flow of air through the nozzle.

The oscillation of the nozzle is produced as may be seen in Figure 2, by the finger 45 of the rocker rod 46 which is supported as shown at 47 and 48 and has a lever 49 which is raised and lowered by the connecting rod llll which is best seen in Figure 1. On further reference to Figure 1, it will be seen that the rod 50 is connected to the gear wheel which is in mesh with the small gear 52 which in turn is operated by the rod 53 which has an eccentric 54 mounted on the compressor drive shaft.

It may therefore be seen that air is forced into the compression tank 17 from the compressor cylinder 16 through the pipe 21. From the compression cylinder it is driven through the nozzle 25 and is discharged at the point 55, where it acts to drive away the heat emanating from the projector before it can reach the film 14. The oscillation of the nozzle and the raising and lowering of the sleeve 40 directs the draft over the face of the film and the immediate surrounding space.

While I have shown the preferred embodiment of my invention, 1 do not wish to be held to the exact construction as illustrated, hut claim the right to such minor modifications as may come within the scope of the appended claims.

Having thus described my invention. what I claim as new and desire to secure by Letters Patent, is as follows:

1. In an apparatus of the class described, the combination with a suitab'e air compressor and a compression tank, of an oscillatory nozzle, which nozzle is provided with a circular base element which is mounted within a housing attached to the said compression tank, an air passage through the said housing and through the said base element and nozzle, and a control valve within the said passage, a crank member suitably connected to the said circular base, and a rocker rod suitably mounted and having a finger engaging the said crank, and the said rod operated by means of the dr' iug mechanism of the said air compressor.

2. In an apparatus of the class described, the combination with a suitable air com pressor and a compression tank, of a nozzle, which nozzle comprises a tubular element having at its base a circular member, an air passage extending through the whole, and the said circular member rotatably mounted within a housing which is attached to the said compression tank and is open to permit of the passage of air from the said tank and the said nozzle, a control valve within the said air passage, a stud on the said circular member and projecting outward through the said housing and having attached thereto a slotted crank, a rocker rod suitably mounted and having a finger engaging the said crank, and the said rocker rod actuated by means of a lever at one end which is pivotaliy secured to a connecting rod which is in turn connected to a gear wheel, which wheel is operated through a drive gear. anl an eccentric shaft connected to the drivii'ig mechanism of the said air compressor.

8. In an apparatus of the class described, the combination with a suitable air compressor and a compression tank, of a tubular nozzle which is rotatably mounted at its base end within a housing which is attached to the said compression tank, an air passage through the said nozzle and the said housing 'nto the said com ression tank and a control valve within the said air passage, a sleeve member slidably mounted on the said nozzle and having its lower end shaped in contour high at the center and low at the sides thereof, and the contoured portion in contact with a cam linger mounted on the aforesaid housing, and retracting springs secured to the said sleeve and to the said housing, and means to rotate the base end of the said nozzle within the limits of the said housing, substantially as shown and described.

In testimony whereof I have allixed my signature.

GESUALDG LOSCHTRICO. 

